This is why I loved computers as a kid. The adults and systems around me were capricious but computers had reproducible behavior.
In a lot of ways the LLM era seems like a culmination of that illusion.
Now I know the author was legit.
I can’t remember whether I bought it or was given it, but it would have been some time around 1988 or 1989, because I think I still had my ZX Spectrum at that point. Or I might have picked it up on a choir tour in the early summer of 1990 - by which time I was into a relatively brief ownership of a C64 - because I have distinct memories of reading it on a narrow boat.
I enjoyed it quite a lot but, even then, its somewhat satirical take on microcomputers and the culture around them already felt quite outdated in many ways, so it was like a slightly jaded insider’s view into a past I hadn’t quite experienced - especially user groups.
At any rate it obviously made an impression because 36 years later I still own it - even though I probably haven’t read it in 35 years (though I did read it several times) - which I cannot say for a lot of books I had from my childhood and teen years.